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Service bulletin A9121022057052_4

A bulletin is a manufacturer's communication to its dealers, as NHTSA indexes it. The summary is NHTSA's. The document is the manufacturer's: read it at NHTSA. A bulletin is not a recall, and listing a model year does not mean every vehicle of it is concerned.

The communication, as NHTSA indexes it (as of 2026-10-19)
TypeService bulletin
NHTSA id10194377
Published by NHTSA2021-06-03
Manufacturer's numberA9121022057052_4
Manufacturer's date2021-05-17
NHTSA componentEQUIPMENT:ELECTRICAL:NAVIGATIONAL SYSTEM(GLOBAL POSITIONING SYSTEM)

NHTSA's summary

This bulletin contains instructions for when the MMI shows the message "Read error occurred when accessing the navigation data" after initialization and reboots constantly with DTC B126CF0 and/or B126CF1.

The document

The document is the manufacturer's. This site does not hold it. NHTSA files a document at one of these two addresses; we have not asked NHTSA which.

Components

Equipment and accessories

Trouble codes named

B126C

Vehicles listed
AUDI A32016, 2017, 2018, 2019, 2020
AUDI A42017, 2018, 2019
AUDI A52018, 2019
AUDI A62016, 2017, 2018, 2019, 2020
AUDI A72016, 2017, 2018, 2019, 2020
AUDI Q52018, 2019, 2020
AUDI Q72017, 2018, 2019, 2020
AUDI R82017, 2018
AUDI R82020
AUDI TT2016, 2017, 2018, 2019

Listing a model year does not mean every vehicle of it is concerned: the document says which.

Recalls for the same vehicles and component
20236592023-12-13. Accessories

A recall listed here may apply to some of the same vehicles. Only the manufacturer can say whether it applies to one vehicle.

Other bulletins for the same vehicles and component
A9124992073629_12024-05-07. Service bulletin. This bulletin provides information when the Apple CarPlay connection is dropped repeatedly in short intervals.
A9124022062466_52024-05-06. Service bulletin. This bulletin provides information when Apple CarPlay cannot be started using the Wi-Fi connection (Wireless Carplay).
Audi-Q72024-04-22. Service bulletin. Audi Delivery Guidelines.
Audi-A7-S72024-04-22. Service bulletin. Audi Delivery Guidelines.
A7-S7-A2024-04-22. Service bulletin. Audi Delivery Guidelines.
A7-S72024-04-22. Service bulletin. Audi Delivery Guidelines.
A6-S6-A2024-04-22. Service bulletin. Audi Delivery Guidelines.
A6-S62024-04-22. Service bulletin. Audi Delivery Guidelines.
SM 22-20242024-04-05. Service bulletin. This special notice is to inform dealers to return the parts listed and only order the successor parts going forward.
SM 21-20242024-04-05. Service bulletin. This special notice is to inform dealers to return the parts listed and only order the successor parts going forward.